BY ARTHUR M. LEA. 7 iT 



AA. Foveas of prothorax connected. 

 B. Front tibiae edentat?e. 



c. Antennae of uniform colour variabilis. 



cc. Antennse with club dark aaitidens. 



BB. Front tibiae dentate or emarginate. 



C. Epipleural furrow absent hirsuta. 



CC. Epipleural furrow present. 



D. Metasternum without tubercles bryophila. 



DD. Metasternum with one conspicuous tubercle acanthosterna. 

 DDD. Metasternum with four small tubercles, quadrituherculatar- 

 DDDD. Metasternum with two tubercles. 



E. Four front femora very stout crassipes. 



EE. Femora not conspicuously stout. 

 F. Tubercles much nearer hind than 



middle coxce parvidens. 



FF. Tubercles equidistant from mid- 

 dle and hind coxse atriclava. 



Rybaxis Harti Blackb. 



In these Proceedings for 1900 (p.lol), M. Raffray stated that 

 this name was a synonym of R. Isidorce, basing this statement 

 on the description of the intermediate tibiae. There are before 

 me, however, two species which have the four front tibiee peculiar, 

 and these I believe to be R. Harti and R. Isidurce. 



The legs and antennae of R. Isidorce. (the male which I refer to 

 R. Isidorce agrees with the description of R. antilope; it is rather 

 larger than the female) are stouter than in R. Harti, the front 

 tibiae are more noticeably armed, and the median pair with the 

 armature of the strongly emarginated portion rather less con- 

 spicuous; the second joint of antennae is also considerably larger. 

 The elytral striation is more pronounced, and the upper surface 

 of the abdomen has the oblique impressions still shorter. But 

 the two are readily distinguished by the terminal joint of the 

 antennae. In R. Harti the apical joints are infuscate (Blackburn 

 says "apicem versus infuscatis "). In R. Isidorce the eleventh 

 joint is conspicuously paler than the tenth (Schaufuss says 

 " articulo ultimo .... pallidis "). 



